1，传送文件包到LINUX系统并解压
    A，利用SecureCRT 5.1.3登陆，传送文件到系统
        root@yuanxh-desktop:/home/yuanxh# mkdir at91_works
        root@yuanxh-desktop:/home/yuanxh# chmod 777 at91_works/
        root@yuanxh-desktop:/home/yuanxh# cd at91_works/
        root@yuanxh-desktop:/home/yuanxh/at91_works# rz
        在SecureCRT弹出的窗口中选择AT91Bootstrap1.5.zip，u-boot-1.1.5.tar.bz2，u-boot-1.1.5_atmel_1.4.diff.bz2软件包
    B，解压所有软件包
        在虚拟机窗口中右击AT91Bootstrap1.5.zip，选择“解压到此处”来解压，同样解压u-boot-1.1.5_atmel_1.4.diff.bz2；
        root@yuanxh-desktop:/home/yuanxh/at91_works# tar xjvf u-boot-1.1.5.tar.bz2
       
2，编译生成一级启动目标码
    A，为Bootstrap-v1.5指定编译器
        root@yuanxh-desktop:/home/yuanxh/at91_works# cd Bootstrap-v1.5/board/at91sam9260ek/nandflash/
        root@yuanxh-desktop:/home/yuanxh/at91_works/Bootstrap-v1.5/board/at91sam9260ek/nandflash# vi Makefile
        把文件中的CROSS_COMPILE=/usr/local/arm/eldk-4.1/usr/bin/arm-linux-填好，指定eldk-4.1的编译器；
    B，编译生成了目标码并传送回XP
        root@yuanxh-desktop:/home/yuanxh/at91_works/Bootstrap-v1.5/board/at91sam9260ek/nandflash# make
        root@yuanxh-desktop:/home/yuanxh/at91_works/Bootstrap-v1.5/board/at91sam9260ek/nandflash# sz nandflash_at91sam9260ek.bin
        在dataflash目录同样修改Makefile也能生成dataflash_at91sam9260ek.bin；
        注意：必须保证 dataflash_at91sam9260ek.bin 和平nandflash_at91sam9260ek.bin 小于4KB；
3，编译生成二级启动目标码
    A，打上补丁
        root@yuanxh-desktop:/home/yuanxh/at91_works# cd u-boot-1.1.5
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# mv ../u-boot-1.1.5_atmel_1.4.diff .
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# apt-get install patch
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# patch -p1 < ./u-boot-1.1.5_atmel_1.4.diff
    B，指定编译器
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# vi Makefile
        把CROSS_COMPILE = arm-linux- 改成 CROSS_COMPILE=/usr/local/arm/eldk-4.1/usr/bin/arm-linux-
    C，配置并编译在DATAFLASH中运行模式
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# apt-get install libncurses5-dev
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make clean
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make mrproper
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make at91sam9260ek_config
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# mv u-boot.bin u-boot-env-df.bin
        注意：需要修改一下/u-boot-1.1.5/examples/Makefile的语法错误，请按/u-boot-1.1.6/examples/Makefile部分更新；
    D，配置并编译在NANDFLASH中运行模式
     修改配置头文件
     root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# vi include/configs/at91sam9260ek.h
     把文件中的
     #define CFG_ENV_IS_IN_DATAFLASH         1
  #undef CFG_ENV_IS_IN_NAND
  改成
  #undef  CFG_ENV_IS_IN_DATAFLASH
  #define  CFG_ENV_IS_IN_NAND            1
  重新编译
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make clean
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make mrproper
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make at91sam9260ek_config
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# make
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# mv u-boot.bin u-boot-env-nf.bin
    E，发送目标码
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# sz u-boot-env-df.bin
        root@yuanxh-desktop:/home/yuanxh/at91_works/u-boot-1.1.5# sz u-boot-env-nf.bin